Genetics worksheet with answers

In pea plants, purple flowers (A) are dominant over white (a). A plant with genotype Aa is crossed with a plant with genotype Aa. What is the probability P that an offspring has white flowers?

Two Tt parents are crossed. T gives tall plants and is dominant over t, which gives short plants. Click the cell for an offspring that has tall plants and is homozygous.

1. 1T × T
2. 2T × t
3. 3t × T
4. 4t × t

Tall (A) is dominant over short (a), and round seeds (B) over wrinkled (b). The genes are on different chromosomes. For the cross AaBb × aaBb, what is the probability P that an offspring is tall, wrinkled seeds?

Tall (A) is dominant over short (a), and round seeds (B) over wrinkled (b). The genes are on different chromosomes. For the cross AaBb × AaBb, what is the probability P that an offspring is short, wrinkled seeds?

Two AaBb parents are crossed. Gene A gives round seeds (dominant) or wrinkled seeds; gene B gives yellow seeds (dominant) or green seeds. Click the one cell for an offspring that is homozygous for round seeds and shows green seeds.

1. 1ab × AB
2. 2ab × ab
3. 3ab × aB
4. 4ab × Ab
5. 5AB × AB
6. 6AB × ab
7. 7AB × aB
8. 8AB × Ab
9. 9Ab × AB
10. 10Ab × ab
11. 11Ab × aB
12. 12Ab × Ab
13. 13aB × AB
14. 14aB × ab
15. 15aB × aB
16. 16aB × Ab

Two AaBb parents are crossed. Gene A gives black fur (dominant) or white fur; gene B gives round seeds (dominant) or wrinkled seeds. Click the one cell for an offspring that is homozygous for black fur and shows wrinkled seeds.

1. 1ab × ab
2. 2ab × AB
3. 3ab × aB
4. 4ab × Ab
5. 5AB × ab
6. 6AB × AB
7. 7AB × aB
8. 8AB × Ab
9. 9aB × ab
10. 10aB × AB
11. 11aB × aB
12. 12aB × Ab
13. 13Ab × ab
14. 14Ab × AB
15. 15Ab × aB
16. 16Ab × Ab